When your blood sugar drops below 70 mg/dL, you need fast-acting carbohydrates first, then a balanced snack or meal to keep it stable. The key is a two-step approach: a quick sugar source to bring your levels up within minutes, followed by slower-digesting food to prevent another drop. What you eat and when you eat it both matter.
Fast-Acting Foods to Raise Blood Sugar Quickly
The standard approach is called the 15-15 rule: eat 15 grams of fast-acting carbohydrates, wait 15 minutes, then check your blood sugar again. If it’s still below 70 mg/dL, repeat. Keep going until your levels are back in your target range.
Any of these provides roughly 15 grams of quick carbohydrates:
- 3 glucose tablets (the fastest, most precise option)
- Half a cup (4 ounces) of fruit juice or regular soda (not diet)
- 6 or 7 hard candies
- 1 tablespoon of sugar or honey
These foods work because they’re almost pure simple sugar with little fat, protein, or fiber to slow absorption. That’s exactly what you want in the moment. Chocolate, cookies, or ice cream are tempting choices, but their fat content slows digestion and delays the blood sugar rise when you need it most.
For young children, 15 grams may be too much. Infants and toddlers typically need a smaller amount, so it’s worth having a pediatrician-approved number on hand before an episode happens.
What to Eat After Your Levels Come Back Up
Once your blood sugar is back above 70 mg/dL, the fast-acting sugar you just ate will burn through quickly. Without a follow-up snack or meal, you risk dropping again within the hour. This is where protein, fat, and complex carbohydrates come in.
A good stabilizing snack pairs a carbohydrate with a protein or healthy fat. Think peanut butter on whole-grain crackers, cheese and an apple, a handful of nuts with a banana, or Greek yogurt with some berries. If a full meal is coming within 30 to 60 minutes, you can skip the snack and eat your meal instead, as long as it includes protein alongside your carbs.
The goal is to give your body fuel that digests slowly. Protein and fat take longer to break down than carbohydrates alone, so they create a more gradual, sustained rise in blood sugar rather than another sharp spike and crash.
Eating to Prevent Lows Throughout the Day
If you experience low blood sugar regularly, especially the reactive type that hits a few hours after eating, the pattern of your meals matters as much as what’s on the plate. Eating every 3 to 4 hours helps keep blood sugar steady. During stretches when symptoms are frequent, eating every 2 hours may be necessary.
Every meal and snack should include a protein source: eggs, meat, fish, cheese, yogurt, nuts, beans, or tofu. Protein paired with carbohydrates slows the rate at which sugar enters your bloodstream, preventing the rapid spike-then-crash cycle that triggers reactive lows. Eating a bowl of plain pasta or a bagel by itself, for example, is more likely to cause a blood sugar swing than eating that same carbohydrate alongside chicken or cheese.
Concentrated sweets eaten on their own are particularly problematic. A candy bar or sugary drink on an empty stomach can send blood sugar soaring, only for it to plummet an hour or two later. If you want something sweet, having it as part of a balanced meal blunts that effect considerably.
Alcohol deserves special attention. It can cause blood sugar to drop, especially on an empty stomach. If you drink, eating food alongside it helps reduce that risk.
Bedtime Snacks to Prevent Overnight Drops
Low blood sugar during sleep is harder to catch because you can’t feel the early warning signs as easily. Clues that it’s happening include waking up sweaty, having nightmares, or feeling unusually tired and irritable in the morning even after a full night’s rest.
If you take insulin or other medications that can lower blood sugar, a bedtime snack that combines carbohydrate, protein, fat, and fiber helps maintain stable levels through the night. Good options include a tablespoon of peanut butter with celery, a hard-boiled egg, a light cheese stick, or Greek yogurt. These are low in sugar but high in protein and fat, giving your body slow-burning fuel that lasts for hours.
If your lows tend to happen around the same time most days, planning a snack just before that window can head off the drop before it starts. Keeping a log of when episodes occur makes these patterns easier to spot.
Recognizing Low Blood Sugar Symptoms
Knowing what to eat only helps if you recognize a low when it’s happening. Early signs include shakiness, sudden hunger, sweating, a fast or uneven heartbeat, dizziness, and difficulty concentrating. You might feel irritable or anxious for no obvious reason, or notice tingling in your lips or tongue.
As blood sugar drops further, symptoms become more serious: confusion, slurred speech, blurry vision, and loss of coordination. At this stage, you can still treat yourself with fast-acting carbohydrates, but you need to act quickly.
Severe hypoglycemia can cause seizures or loss of consciousness. At that point, the person cannot safely eat or drink anything. This is when a glucagon emergency kit, which someone else administers, and a call to 911 become necessary. If you’ve experienced severe lows before, making sure the people around you know where your glucagon is stored and how to use it is one of the most important things you can do.
What to Keep on Hand
The worst time to figure out what to eat is when your blood sugar is already dropping and your thinking is getting foggy. Keeping a small stash of fast-acting options wherever you spend time saves critical minutes. Glucose tablets are the most reliable choice because each tablet has a precise carbohydrate count, they don’t melt or spill, and they work fast. A small juice box or a few hard candies work well too.
At home, keep your go-to follow-up snacks stocked and easy to grab. At work or in a bag, single-serve packets of nut butter, cheese sticks, or trail mix give you something to stabilize your levels after the initial sugar does its job. The combination of being prepared for both steps, the fast fix and the lasting follow-up, is what keeps a mild episode from turning into a bigger problem.